Citrine, Quartz Perle / Pearl Boulder or boulder opal is

Boulder or boulder opal is often larger and less expensive than black opal

Couleur : Rouge très foncé

Iolite is one of the few stones that shows marked pleochroism

Shattuckite is a relatively rare

Citrine, Quartz Perle / Pearl Boulder or boulder opal isCitrine is part of the large quartz family. Its yellow to orange yellow color is due to the presence of iron (Fe). It is known to be one of the best selling yellow stones in the world, in addition to being the birthstone for the month of November. Variety: Quartz Color: Orangy yellow Dimensions : 8. 00 mm Weight: 2. 31 ct Shape : Square cushion, bufftop Origin: Heated Hardness: 7 Actual product colors may vary from colors shown on your monitor.